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Diffstat (limited to 'include/binder/MemoryHeapBase.h')
-rw-r--r-- | include/binder/MemoryHeapBase.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/include/binder/MemoryHeapBase.h b/include/binder/MemoryHeapBase.h new file mode 100644 index 0000000..83c7283 --- /dev/null +++ b/include/binder/MemoryHeapBase.h @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_MEMORY_HEAP_BASE_H +#define ANDROID_MEMORY_HEAP_BASE_H + +#include <stdlib.h> +#include <stdint.h> + +#include <binder/IMemory.h> + + +namespace android { + +// --------------------------------------------------------------------------- + +class MemoryHeapBase : public virtual BnMemoryHeap +{ +public: + enum { + READ_ONLY = IMemoryHeap::READ_ONLY, + MAP_ONCE = IMemoryHeap::MAP_ONCE, + // memory won't be mapped locally, but will be mapped in the remote + // process. + DONT_MAP_LOCALLY = 0x00000100 + }; + + /* + * maps the memory referenced by fd. but DOESN'T take ownership + * of the filedescriptor (it makes a copy with dup() + */ + MemoryHeapBase(int fd, size_t size, uint32_t flags = 0); + + /* + * maps memory from the given device + */ + MemoryHeapBase(const char* device, size_t size = 0, uint32_t flags = 0); + + /* + * maps memory from ashmem, with the given name for debugging + */ + MemoryHeapBase(size_t size, uint32_t flags = 0, char const* name = NULL); + + virtual ~MemoryHeapBase(); + + /* implement IMemoryHeap interface */ + virtual int getHeapID() const; + virtual void* getBase() const; + virtual size_t getSize() const; + virtual uint32_t getFlags() const; + + const char* getDevice() const; + + /* this closes this heap -- use carefully */ + void dispose(); + + /* this is only needed as a workaround, use only if you know + * what you are doing */ + status_t setDevice(const char* device) { + if (mDevice == 0) + mDevice = device; + return mDevice ? NO_ERROR : ALREADY_EXISTS; + } + +protected: + MemoryHeapBase(); + // init() takes ownership of fd + status_t init(int fd, void *base, int size, + int flags = 0, const char* device = NULL); + +private: + status_t mapfd(int fd, size_t size); + + int mFD; + size_t mSize; + void* mBase; + uint32_t mFlags; + const char* mDevice; + bool mNeedUnmap; +}; + +// --------------------------------------------------------------------------- +}; // namespace android + +#endif // ANDROID_MEMORY_HEAP_BASE_H |